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OPA548: 使用OPA548,在不对称供电(-5V/55V)下输出50V,电压不足

Part Number: OPA548

你好,我在使用OPA548前,用你们的模型仿真得到的结果是,在-5V/+55V的供电条件下,可以比较好的线性输出至接近电源的电压;

但我在实际的电路中,一样也是使用如下电路,却无法输出至40V以上,请问是模型的问题,还是其他问题导致的?